[Telemetry] Fix sudoers file parsing

tools/telemetry/telemetry/core/platform/posix_platform_backend_unittest.py

Index: tools/telemetry/telemetry/core/platform/posix_platform_backend_unittest.py
diff --git a/tools/telemetry/telemetry/core/platform/posix_platform_backend_unittest.py b/tools/telemetry/telemetry/core/platform/posix_platform_backend_unittest.py
index 4c83697da1453af97dc2df364610b2a6c4a19a58..eed5c0cd27e387f45fe66effa75d190036165332 100644
--- a/tools/telemetry/telemetry/core/platform/posix_platform_backend_unittest.py
+++ b/tools/telemetry/telemetry/core/platform/posix_platform_backend_unittest.py
@@ -51,6 +51,31 @@ class PosixPlatformBackendTest(unittest.TestCase):
     result = backend.GetChildPids(1)
     self.assertEquals(set(result), set([2, 3]))
 
+  def testSudoersFileParsing(self):
+    binary_path = '/usr/bin/pkill'
+    self.assertFalse(
+        posix_platform_backend._BinaryExistsInSudoersFiles(binary_path, ''))
+    self.assertFalse(
+        posix_platform_backend._BinaryExistsInSudoersFiles(
+            binary_path,'    (ALL) ALL'))
+    self.assertFalse(
+        posix_platform_backend._BinaryExistsInSudoersFiles(
+            binary_path,'     (root) NOPASSWD: /usr/bin/pkill_DUMMY'))
+    self.assertFalse(
+        posix_platform_backend._BinaryExistsInSudoersFiles(
+            binary_path,'     (root) NOPASSWD: pkill'))
+
+
+    self.assertTrue(
+        posix_platform_backend._BinaryExistsInSudoersFiles(
+            binary_path,'(root) NOPASSWD: /usr/bin/pkill'))
+    self.assertTrue(
+        posix_platform_backend._BinaryExistsInSudoersFiles(
+            binary_path,'     (root) NOPASSWD: /usr/bin/pkill'))
+    self.assertTrue(
+        posix_platform_backend._BinaryExistsInSudoersFiles(
+            binary_path,'     (root) NOPASSWD: /usr/bin/pkill arg1 arg2'))
+
   @benchmark.Enabled('linux', 'mac')
   def testIsApplicationRunning(self):
     platform = platform_module.GetHostPlatform()